Fludrocortisone acetate (Standard) is the standard substance of Fludrocortisone acetate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Fludrocortisone acetate (9α-Fludrocortisone acetate) , a glucocorticoid-receptor agonist, binds to cytoplasmic receptors, translocates to the nucleus, and subsequently initiates the transcription of glucocorticoid-responsive genes such as lipocortins to inhibit phospholipase A2 (PLA2). Fludrocortisone acetate is the acetate salt of a synthetic fluorinated corticosteroid with anti-inflammatory and antiallergic activities. Inhibition of PLA2 activity prevents the release of arachidonic acid, a precursor of eicosanoids such as prostaglandins and leukotrienes; eicosanoids are important mediators in the pro-inflammatory response mechanism. As a mineralocorticoid-receptor agonist, this agent stimulates Na+ reabsorption and water retention and K+ and H+ secretion in the distal tubules and collecting ducts of the kidney.